Need advice on triangulation

But if I have three mics set up in a triangle, a sound source at an unknown location (inside or outside of the triangle) and all I know is which mic the sound reached first, and the time it takes to travel to the other two mics, is there a standard way of triangulating the angle and/or distance?

maybe similar to the way they determine the source of an earthquake (except I dont' know the beginning time of the source...) ?